（2） Another reason is that bodily pleasures are sought for, just
because of their intensity, by people who are incapable of enjoying others （for
instance, some deliberately take steps to make themselves thirsty） : not that
there is any objection to this if the pleasures are innocuous, but it is bad if they are
productive of harmful results. The fact is that some men have no other sources of
enjoyment; and also many are so constituted that a neutral state of feeling is to them
positively painful. （This is because a state of strain is the normal condition of
an animal organism, as physiology testifies; it tells us that sight and hearing are in
fact painful, but we have got used to them in course of time—such is the
theory.）